17990665016 has 8 divisors (see below), whose sum is σ = 33732496920. Its totient is φ = 8995332504.

The previous prime is 17990665009. The next prime is 17990665031. The reversal of 17990665016 is 61056609971.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1124416556 + ... + 1124416571.

It is an arithmetic number, because the mean of its divisors is an integer number (4216562115).

Almost surely, 2^17990665016 is an apocalyptic number.

It is an amenable number.

17990665016 is a deficient number, since it is larger than the sum of its proper divisors (15741831904).

17990665016 is a wasteful number, since it uses less digits than its factorization.

17990665016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248833133 (or 2248833129 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 17990665016 in words is "seventeen billion, nine hundred ninety million, six hundred sixty-five thousand, sixteen".